Sensitivity of Nanostructured Iron Metal on Ultrasonic Properties

Alok Kumar Gupta, Archana Gupta, Devraj Singh, Sudhanshu Tripathi

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DOI: 10.4236/ojmetal.2011.12005                

Abstract

The present investigation is focused on the influence of the nanocrystalline structure of pure iron metal on the ultrasonic properties in the temperature range 100 - 300 K. The ultrasonic attenuation due to phonon- phonon interaction and thermoelastic relaxation phenomena has been evaluated for longitudinal and shear waves along <100>, <110> and <111> crystallographic directions. The second-and third-order elastic constants, ultrasonic velocities, thermal relaxation, anisotropy and acoustic coupling constants were also com- puted for the evaluation of ultrasonic attenuation in this temperature scale. The direction <111> is most ap- propriate to study longitudinal sound waves, while <100>, <110> direction are best to propagate shear waves due to lowest values of attenuation in these directions. Other physical properties correlated with obtained results have been discussed.

Keywords

Iron Metal, Elastic properties, Ultrasonic Attenuation

Conflicts of Interest

The authors declare no conflicts of interest.

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